Core structure



Oct. 10, 1933; P. J. MULLIGAN 1,930,250

CORE STRUCTURE Original Filed Nov. 17. 1928 Patented Oct. 10, 1933 PATENT OFFICE 1,930,250 CORE STRUCTURE Patrick J. Mulligan, Philadelphia, Pa., assignor to Scott Paper Company, a. corporation of Pennsylvania Original application November 17, 1928, Serial 320,045. Divided and this application June 21, 1932. Serial No. 618,481

2 Claims.

This application is a division of my application Serial Number 320,045, and filed November 17, 1928, for the manufacture of paper rolls, and is restricted to the toilet roll as an article of manufacture.

The object of my invention is to provide a method and means for the manufacture of paper rolls having a tubular core, wherein the latter is formed of an integral portion of the paper making up the roll.

Heretofore, rolls of toilet paper having tubular cores have been made by employing previously prepared cardboard tubes, placing the same upon the winding bar by hand, and then attaching the paper web to the core while being rotated. By my improvements, the employment of a cardboard tube or any previously constructed tubular core is entirely dispensed with; and for the purpose of providing a firm tubular center or core to the paper roll, I cause the initial portions of the roll adjacent to the winding bar or mandrel to be wound thereon for a few turns without paste or glue and thereupon continue to wind afurther and longer length of the same web upon the bar or mandrel with the application of paste or glue and directly upon the unglued web already thereon to form a multiple tube, and thereafter continuing to wind the paper web to the full diameter of the roll without the application of adhesive.

My improved paper roll may be concisely defined as having two superimposed core portions formed from the same continuous web, one of the core portions being wound upon itself in an unpasted condition to form an inner unpasted core portion and the other core portion having its layers pasted together, and said core portions having the main part of the roll formed of a continuous web rolled about the outer portion of the core and upon itself, whereby the two inner core portions, pasted and unpasted, are integral parts of the same continuous web forming the outer roll of the paper.

Referring to the drawing: Fig. 1 is an end view of a paper roll embodying my improvements; Fig. 2 is a front view of the same with a portion broken away; Fig. 3 is a perspective view of a strip of paper web indicating the relation of the gummed and ungummed portions thereof which enter into the make-up of the improved roll; and Fig. 4 is an end View of a portion of a machine for applying paste to the web of paper in the act of forming a part of the finished roll.

2 are the unpasted layers of the inner core, 3 are the pasted layers constituting the outer core portion, and 4 illustrates the main unpasted roll portion. The several parts 2, .3 and 4 are of the same continuous web, and the unpasted inner core portion and pasted outer core portion jointly compose the core of the roll as a whole, and it will be seen in the making of the roll that the pasted or glued portion 3 is interposed between the two unpasted portions 2 and 4 of the web.

The paste or glue may be applied to the rotating paper web during the initial rotation of the mandrel or bar, and as a convenient means for accomplishing this purpose I have employed in a paper slitting and winding machine the following instrumentalities shown in Fig. 4, in which '7 represents the glue pot, 6 the adhesive applying roll for directly applying paste or glue to the paper web during the winding of the core portion 3, and 11 is a transfer roller which extends into the pot '7 and transfers the paste or glue from the pot to the paste applying roll 6. The pot 7 is arranged to be moved toward and from the mandrel 5 and the paper roll being formed thereon, and to accomplish this I support the pot upon a lever 8 having a pivot or fulcrum at 9. The outer end of the lever 8 is actuated by a cam 10 which, when in contact with the lever, causes the pot to rise and the adhesive applied to the paper web being wound upon the mandrel 5.

The mandrel or winding bar 5 may be of any suitable construction and, as shown in the parent application, it is formed of a collapsible hollow mandrel having apertures and employed with suction creating means to hold the unpasted initial web portion 2 upon the mandrel when forming the roll.

By way of further illustration of the make-up of my improved paper roll, I have indicated in Fig. 3 a web A of paper divided into the portions which go into the make-up of the pasted and unpasted core portions and the main unpasted portion of the web which makes up the larger body of the roll. In Fig. 3, the part 2 is the unpasted portion and may have a length for providing a few plies which initially are wrapped about the mandrel to shield it. The web portion 3 which is integral with the portion 2 has a length of preferably something more than one hundred (100) inches and this portion is glued upon itself and upon the final adjacent integral portion 2 during the act of forming the core of the roll. The part 4 is a continuation of the web and may be of any length required, that is, to provide for as many sheets as is intended to be the size of the commercial roll. The parts 3 and 4 are cut across to indicate any greater length which may be required since there is not space the roll machine operators.

enough on the sheet to show the true relative lengths. The essential part of my invention resides in the continuous web composed of the parts 2, 3 and 4, and with the paste or glue applied to the part 3 intermediate of a short unpasted core portion 2 and the longer unpasted part 4 making up the usable portion of the roll.

As the core is formed from the web itself, there is no uncertainty as to its location, as is the case where the tubular cores previously made have to be positioned upon the mandrel and, therefore, my invention lends itself excellently to the manufacture of commercial rolls where a number of said rolls are simultaneously wound upon the same mandrel after the parent web has been split into a plurality of webs of lesser width.

The character of the adhesive employed should be a quick drying one, and the amount of paper required to make the tubular core structure is about one hundred and twenty-five (125) inches and may be thirty ply or thereabout, but I do not limit myself to these proportions.

Considering my invention from thestandpoint of economy in the manufacture of rclltoilet paper, the making of the core in the manner herein described eliminates the following costly and troublesome features heretofore existing, namely: the costly tube making machinery, the cost of special tube board, excessive quantities of glue and glue preparing apparatus, tube choppers, tube board slitters, intricate tube conveyors to roll machines, tube hoppers for containing the tubes for roll machines, and elimination of the operation of putting tubes on winding bars by My invention further causes less wear and tear on the winding bars or mandrels by eliminating the necessity of placing the bars on end into supporting sockets extending below the floor, and the elimination of the steel supporting floor sockets, also of the entire tube making and operating labor force, and in addition to the foregoing, the gain of the additional and cleaner factory floor space due to the elimination of all machinery connected with the making and handling of the tube elements.

Furthermore, it will be manifest that the simplicity of construction of my improved paper roll enables commercial production of roll toilet paper at a considerably reduced cost and a materially increased output from the same investment in machinery as was heretofore required.

Aside from the advantages in the process or method of manufacturing the special rolls of paper herein described, these rolls with the internal unpasted web core portion provide soft loose ends at the core which when clamped between the circular flanged clamping ends to the arms of a dispensing device cause said rolls to be more frictionally held against rotation than occurs with rolls having cardboard tubes or made up of the web pasted tightly upon itself, the same being emphasized in Letters Patent No. 1,815,068, dated July 21, 1931, wherein it is pointed out that the .roll is insured against too free unreeling under rotary momentum which may be imparted to the roll when withdrawing a limited length of the web. The dispensing fixture disclosed in the said patent comprises a two-armed fixture having cylindrical flanged portions to fit into the apertures at the ends of the roll core and capable of putting a pinching action upon the interior contents of the said core. My improved paper roll having a soft unpasted overlapping portion within the core is adapted to frictionally engage the arms in toilet fixtures of that character.

I have described my improved article of manufacture in that particularity which I deem to be the best exposition of my invention and that which I prefer in commercial practice, but I do not restrict or confine myself to the minor or secondary details, as such are susceptible of modification which may be resorted to as a matter of mechanical skill and without a departure from the spirit of the invention.

I claim:

1. A roll of paper having two superimposed core portions formed from the same continuous web, one of the core portions being wound upon itself in an unpasted condition to form an inner unpasted core portion and the other core portion having its layers pasted together, and said core portions having the main part of the roll formed of a continuous web rolled about the outer portion of the core and upon itself, whereby the two inner core portions, pasted and unpasted, are integral parts of the same continuous web forming the outer roll of the paper.

2. The herein described method of making an improved roll of toilet paper, which consists in wrapping one end of a strip of paper into a plurality of unpasted convolutions and thereafter wrapping a greater quantity of convolutions in pasted condition surrounding the said unpasted convolutions, and finally wrapping about the pasted convolutions as a core portion a large number of unpasted convolutions to form the main body of the roll, the pasted and unpasted convolutions being integral parts of the same continuous web.

- PATRICK J. MULLIGAN. 

